衍生自双丙酮-α-D-葡萄糖的酮是用于合成含有1,2,3-三唑部分作为糖间键的3- C-连接的糖杂的合适原料。3-脱氧-3-(1,2,3-1 H-三唑-1-基)葡萄糖,3- C -[(1,2,3-1 H三唑-1-基)甲基]的吡喃糖互变异构体相应的O-异亚丙基保护的呋喃糖基型合成中间体经酸水解后,会释放出半乳糖和3- C -[((1,2,3-1 H-三唑-1-基)甲基)古洛糖部分。一些标题化合物显示出罕见的激活大肠杆菌β-半乳糖苷酶的特性。
Synthesis and X-ray studies of novel 3-C-nitromethyl-hexofuranoses
摘要:
A practical method for the synthesis of three novel 3-C-nitromethyl-hexofuranoses is reported. The Henry reaction on a 1,2: 5,6-di-O-isopropylidene-alpha-D-gulofuranose-derived ketone provided a 3-C-branched gulo-isomer as the sole reaction product. The dehydration-rehydration of the latter yielded an isopropylidene-protected 3-C-nitromethyl-galactofuranose. The reaction sequence can be also used for the synthesis of a 3-deoxy-3-C-nitromethyl-hexofuranose derivative with a gulo-configuration. Two of the newly obtained carbohydrate derivatives were characterized by X-ray crystallography. (C) 2014 Elsevier Ltd. All rights reserved.